Automatic relief-valve.



N0. 874,736. PATENTEDYDEG. 24-, 907.

AUTOMATIC RELIEF VALVE.

APPLICATION FILED APB. 13, 1906.

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PATENTED DEC. 24; 1907. J. BUCKLE-Y.

AUTOMATIC RELIEF VALVE.

APPLICATION FILED APR. 13,1906.

2 SHEETS-SHEET 2.

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THOMAS J. BUCKLEY, OF CHICAGO, ILLINOIS.

AUTOMATIC RELIEF-VALVE.

Specification of Letters Patent.

Patented Dec. 24;, 1907.

Application filed April 13 1906. Serial No. 311,593.

To all whom it may concern:

Be it known that I, THoMAs J. BUCKLEY, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented a new and useful Automatic Relief-Valve, of which the following is a specification.

My invention relates to relief valves used on steam chests and cylinders; and the objects of my improvements are first, to provide means whereby the steam or water in a cylinder is free to blow off into the atmosphere while no steam pressure is admitted into the cylinder; second, to automatically shut off the blow'off ports when live steam is admitted into the steam chest of the cylinder; third, to provide means whereby the blow off ports can be opened if desired while live steam is being admitted to the steam chest of the cylinder; fourth, to make a neat, simple and cheap construction and other objects to become apparent from the description to follow.

This device is particularly designed to be used on locomotive cylinders but may be .used on any cylinder if desired. The cylin-' ders on a locomotive are provided with small blow off valves on their under side to allow the condensed steam or other impurities to be expelled from the cylinder, and to acquire the greatest eificiency from the engine controlling mechanism has heretofore been provided which was operated by the piston to alternately open and close the valves, that is open the valves when no live steam pressure is acting against them. To bring t is controlling mechanism into operation the engineer or some other erson had to operate a lever, and to throw t e mechanism out of operation another movement of the lever was required by the attendant.

By the use of my invention the blow off valves are controlled automatically and their operation or movements require no attention of the attendant.

"To describe my invention fully so that others versed in the art to which it pertains can understand it sufficiently to make and use the same, I have illustrated it on the accompanying two sheets of drawings forming a part of this specification, in which Figure l, is a side view of a cylinder having my invention applied thereto; Fig. 2, is an enlarged side elevation of a valve embodying my invention Fig. 3, is a longitudinal central section of the same partly in elevation; Fig.

4, is a section on 44 of Fig. 3; Fig. 5, is a section on 55 of Fig. 3, and Fig. 6, is a section on 66 of Fig. 3.

Similar reference characters refer to similar parts throughout the several views.

In the drawings 7 is a cylinder; 8 is the steam chest; 9 is a pipe leading into one end of the cylinder 10 is a similar pipe leading into the other end of the cylinder; 11 is a valve embodying my invention and has the pipe 9 entering it at one end and the pipe 10 entering it at the other end. The pipes 9 and 10 could. be made to enter the valve 11 at one point since the parts to be described which operate in conjunction with said two pipes are exact duplicates.

The valve 11 comprises the central cylindrical portion 12 having both ends internally threaded, into which are secured the nipples 13 and 14, which are provided with the valves 15. The nipples Band 14 are provided with a plurality of radiating openings 16 forming communication between the outside and the interior openings of the nipples in which the valves 15 are fitted to move. The interior. opening of nipple 13 is connected with pipe 9 and the interior opening of nipple 14 is connected with pipe 10. The valves 15 control the communication between the pipes 9, 10 and the openings 16.

Depending from the portion 12 is the pocket 17 whose communication with the interior of portion 12 between valves 15 is controlled by the valve 18. The ocket 17 has constant communication wit terior by means of the holes 19.v The small pipe 20 serves to form communication between the interior of portion 12 between valves 15 and the steam chest 8.

In operation, when the engine is running steam pressure is supplied to the steam chest '8 and the pressure is transmitted through pipe 20 to and'against the valves 15 which are forced thereby to their seat, closing the communication between pipes 9, 10 and openings 16, thus preventing the escape of any steam from the cylinder 7 through pipes 9 and 10. When the steam pressure is shut off from the engine there is no pressure in the steam chest 8 and consequently none in pipe 20 or against the valves 15, and the continued reciprocation of the piston in cylinder 7, caused by the locomotives movement, causes any condensed steam or impurities which may be in the cylinder at the time, to be expelled therefrom by passing through the expipes 9, past valves and finally through openings 16 into the atmosphere. Only a slight pressure in either pipe 9 or 10 will force the valve 15 back from its seat when no pressure is in pipe 20. To enable the engineer to open the blow off valves 15 while steam is being supplied to the cylinder, a rod 21 provided with a tapered portion is guided to slide under the stem of valve 18, and by sliding said rod in one direction the valve is lifted from its seat and permits the pressure from between the valve 15 to escape to the atmosphere through the holes 19. The holes 19 are considerably larger than the supply of steam pressure through pipe 20, so that there is practically no pressure against the valves 15 and the impurities etc. can be expelled through pipes 9, 10 and holes 16 as previously described.

Having thus fully described my invention what I claim as new and desire to secure by Letters Patent of the United States is 1. In a device of the class described, a cylinder having a blowoff pipe, a valve mounted in a suitable casing, one side of said valve exposed to, and controlling the flow of the fluid in said blow-off pipe and the remaining side of said valve exposed to an inclosed chamber and a pipe forming constant communication between said inclosed chamber and the steam chest of said cylinder.

2. In a device of the class described, a cylinder having a blow-off pipe, a valve mounted in a suitablecasing, one side of said valve exposed to and controlling the flow of the fluid in said blow-off pipe said valve exposed to an inclosed chamber, a pipe forming constant communication between said inclosed chamber and the steam supply to said cylinder and a passageway controlled by a valve forming communication between said inclosed chamber and the exterior atmosphere.

3. In a device of the class described, a cylinder, a relief pipe entering said cylinder, a valve to control the exit of said relief pipe, a second valve of larger area arranged to move said first named valve, a pipe connected to the steam supply for said cylinder leading to one side of said second named valve, a third valve to control the exit of said second named pipe and means for moving said third named valve. i

4. In a device of the class described, a hollow body portion, a hollow nipple screwed into one end of said body portion, a plurality ofradial holes through said nipple a valve controlling communication between said pipe and said holes and a steam pressure pipe leading to the interior of said body portion to control said valve.

1n testimony whereof I have signed my name to this specification in presence of two subscribing witnesses this 27th day of March 1906 at Chicago, Illinois.

THOMAS J. BUCKLEY.

Witnesses:

R. J. JAoKER, DAVID GRIER. 

